python reserve list size code example

Example 1: python list of size

li = [None] * 5 # [None, None, None, None, None]
li = [0] * 5 # [0, 0, 0, 0, 0]

Example 2: how to reduse the size of a list in python

# Reduce size of list by 2 elements.
values = values[:-2]
print(values)
[10, 20, 30, 40, 50]
[10, 20, 30]